have to try this trick...How to use a business card to bounce light up to create a nice overall illumination, while some of the light penetrates directly through the card, disperses and lights the subject from the front.
General Rules and tips for ISO Camera Settings: •Use an ISO of 100 or 200 when taking photographs outside in sunny conditions. • If the sky is overcast or it is evening time, then use an ISO within the range of 400 to 800. • Night time or in cases of low light you might need to set your digital camera ISO to 1600. If you don't then your photo will appear too dark if at all.